Merchant API code sample to render product issues.

### Java

    // Copyright 2025 Google LLC
    //
    // Licensed under the Apache License, Version 2.0 (the "License");
    // you may not use this file except in compliance with the License.
    // You may obtain a copy of the License at
    //
    //     https://www.apache.org/licenses/LICENSE-2.0
    //
    // Unless required by applicable law or agreed to in writing, software
    // distributed under the License is distributed on an "AS IS" BASIS,
    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    // See the License for the specific language governing permissions and
    // limitations under the License.
    package shopping.merchant.samples.issueresolution.v1;

    import com.google.api.gax.core.FixedCredentialsProvider;
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.shopping.merchant.issueresolution.v1.IssueResolutionServiceClient;
    import com.google.shopping.merchant.issueresolution.v1.IssueResolutionServiceSettings;
    import com.google.shopping.merchant.issueresolution.v1.ProductName;
    import com.google.shopping.merchant.issueresolution.v1.RenderIssuesRequestPayload;
    import com.google.shopping.merchant.issueresolution.v1.RenderProductIssuesRequest;
    import com.google.shopping.merchant.issueresolution.v1.RenderProductIssuesResponse;
    import com.google.shopping.merchant.issueresolution.v1.RenderedIssue;
    import com.google.shopping.merchant.issueresolution.v1.UserInputActionRenderingOption;
    import java.io.IOException;
    import shopping.merchant.samples.utils.Authenticator;
    import shopping.merchant.samples.utils.Config;

    /** This class demonstrates how to render product issues for a given Merchant Center account */
    public class RenderProductIssuesSample {

      private static void renderProductIssuesSample(
          Config config,
          String productId,
          String languageCode,
          String timeZone,
          UserInputActionRenderingOption userInputActionOption)
          throws IOException {

        // Obtains OAuth token based on the user's configuration.
        GoogleCredentials credential = new Authenticator().authenticate();

        IssueResolutionServiceSettings settings =
            IssueResolutionServiceSettings.newBuilder()
                .setCredentialsProvider(FixedCredentialsProvider.create(credential))
                .build();

        String accountId = config.getAccountId().toString();
        String name =
            ProductName.newBuilder().setAccount(accountId).setProduct(productId).build().toString();

        try (IssueResolutionServiceClient client = IssueResolutionServiceClient.create(settings)) {

          RenderProductIssuesRequest request =
              RenderProductIssuesRequest.newBuilder()
                  .setName(name)
                  .setLanguageCode(languageCode)
                  .setTimeZone(timeZone)
                  .setPayload(
                      RenderIssuesRequestPayload.newBuilder()
                          .setUserInputActionOption(userInputActionOption)
                          .build())
                  .build();

          System.out.println("Sending RenderProductIssues request");

          RenderProductIssuesResponse response = client.renderProductIssues(request);

          System.out.println("The full response:");
          System.out.println(response);

          System.out.println("---");
          System.out.println(
              "Summary: " + response.getRenderedIssuesCount() + " issues found for the product");
          System.out.println("---");

          for (RenderedIssue issue : response.getRenderedIssuesList()) {
            System.out.println(); // empty line for formatting
            SimpleRenderer.printIssue(issue);
          }
        } catch (Exception e) {
          System.out.println("An error has occured: ");
          System.out.println(e);
        }
      }

      public static void main(String[] args) throws Exception {
        Config config = Config.load();
        String timeZone = "Europe/Zurich";
        String languageCode = "en_GB";
        // The simple option: request all complex actions to be handled as redirects to
        // the Merchant Center. e.g. send the merchant to MC to request an appeal.
        UserInputActionRenderingOption inputActionOption =
            UserInputActionRenderingOption.REDIRECT_TO_MERCHANT_CENTER;
        // An ID assigned to a product by Google. In the format: `contentLanguage~feedLabel~offerId`
        String productId = "en~label~sku123"; // Replace with your product ID

        renderProductIssuesSample(config, productId, languageCode, timeZone, inputActionOption);
      }
    }